Revert "[apkverify] Skip DSA SHA256 during apk verification"

This reverts commit c68b95b84de4b852b0e6480df459b8f8ec8d41e3.

Reason for revert: b/248068872

Test: atest libidsig.test
Change-Id: Ib978f23954fe6d901b4806d230e3067c4572083f
diff --git a/libs/apkverify/src/v3.rs b/libs/apkverify/src/v3.rs
index 5272834..2a16cb1 100644
--- a/libs/apkverify/src/v3.rs
+++ b/libs/apkverify/src/v3.rs
@@ -139,7 +139,7 @@
         Ok(self
             .signatures
             .iter()
-            .filter(|sig| sig.signature_algorithm_id.map_or(false, |algo| algo.is_supported()))
+            .filter(|sig| sig.signature_algorithm_id.is_some())
             .max_by_key(|sig| sig.signature_algorithm_id.unwrap().content_digest_algorithm())
             .context("No supported signatures found")?)
     }